package com.bookstore.client.cart.handler;

import java.io.UnsupportedEncodingException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import com.alipay.api.AlipayApiException;
import com.alipay.api.AlipayClient;
import com.alipay.api.DefaultAlipayClient;
import com.alipay.api.internal.util.AlipaySignature;
import com.alipay.api.request.AlipayTradePagePayRequest;
import com.bookstore.client.cart.service.ICartService;
import com.bookstore.client.product.service.IProductService;
import com.bookstore.commons.beans.Order;
import com.bookstore.commons.beans.OrderItem;
import com.bookstore.commons.beans.Product;
import com.bookstore.commons.beans.User;
import com.bookstore.utils.AlipayConfig;
import com.bookstore.utils.IdUtils;

@Controller
@RequestMapping("/client/cart")
public class CartHandlers {

	@Autowired
	private ICartService cartService;
	
	@Autowired
	private IProductService productService;
	
	@RequestMapping("/addCart.do")
	public String addCartHandler(String id,HttpSession session) {
		
		Product product = productService.findProductById(id);
		
		Map<Product,Integer> cart = (Map<Product, Integer>) session.getAttribute("cart");
		
		if(cart == null) {
			cart = new HashMap<>();
			
		}
		Integer count = cart.put(product, 1);
		if(count != null) {
			cart.put(product, count+1);
		}
		session.setAttribute("cart", cart);
		return "/client/cart.jsp";
	}
	
	@RequestMapping("/changeCart.do")
	public String changeCartHandler(String id,Integer count,HttpSession session) {
		Product product = productService.findProductById(id);
		Map<Product,Integer> cart = (Map<Product, Integer>) session.getAttribute("cart");
		if(count == 0) {
			cart.remove(product);
		}else {
			cart.put(product,count );
		}
		return "/client/cart.jsp";
		
	}
	
	@RequestMapping("/createOrder.do")
	public String createOrderHandler(Model model,Order order ,HttpSession session) {
		order.setId(IdUtils.getUUID());
		User login_user = (User) session.getAttribute("login_user");
		order.setUser(login_user);
		Map<Product,Integer> cart = (Map<Product, Integer>) session.getAttribute("cart");
		for(Product product:cart.keySet()) {
			OrderItem item = new OrderItem();
			item.setOrder(order);
			item.setProduct(product);
			item.setBuynum(cart.get(product));
			cartService.addOrderItem(item);
		}
		cartService.createOrder(order);
		model.addAttribute("order", order);
		return "/client/confirm.jsp";
		
	}
	
	@RequestMapping("/pay.do")
	public void payHandler(HttpServletRequest request,HttpServletResponse response,String id,String money,String name) throws AlipayApiException, Exception{
		//获得初始化的AlipayClient
		AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.gatewayUrl, AlipayConfig.app_id, AlipayConfig.merchant_private_key, "json", AlipayConfig.charset, AlipayConfig.alipay_public_key, AlipayConfig.sign_type);
		
		//设置请求参数
		AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest();
		alipayRequest.setReturnUrl(AlipayConfig.return_url);
		alipayRequest.setNotifyUrl(AlipayConfig.notify_url);
		
		//商户订单号，商户网站订单系统中唯一订单号，必填
		String out_trade_no = new String(request.getParameter("id").getBytes("ISO-8859-1"),"UTF-8");
		//付款金额，必填
		String total_amount = new String(request.getParameter("money").getBytes("ISO-8859-1"),"UTF-8");
		//订单名称，必填
		String subject = new String(request.getParameter("name").getBytes("ISO-8859-1"),"UTF-8");
		//商品描述，可空
	 	String body = new String(request.getParameter("name").getBytes("ISO-8859-1"),"UTF-8");
		 
		/*String out_trade_no = id;
		String total_amount = money;
		String subject = name;
		String body = name;*/
		
	
		
		alipayRequest.setBizContent("{\"out_trade_no\":\""+ out_trade_no +"\"," 
				+ "\"total_amount\":\""+ total_amount +"\"," 
				+ "\"subject\":\""+ subject +"\"," 
				+ "\"body\":\""+ body +"\"," 
				+ "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");
		
		//若想给BizContent增加其他可选请求参数，以增加自定义超时时间参数timeout_express来举例说明
		//alipayRequest.setBizContent("{\"out_trade_no\":\""+ out_trade_no +"\"," 
		//		+ "\"total_amount\":\""+ total_amount +"\"," 
		//		+ "\"subject\":\""+ subject +"\"," 
		//		+ "\"body\":\""+ body +"\"," 
		//		+ "\"timeout_express\":\"10m\"," 
		//		+ "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");
		//请求参数可查阅【电脑网站支付的API文档-alipay.trade.page.pay-请求参数】章节
		
		//请求
		String result = alipayClient.pageExecute(alipayRequest).getBody();
		
		response.getWriter().println(result);
		
	}
	
	@RequestMapping("/pay_success.do")
	public String paySuccessHandler(HttpServletRequest request,Model model) throws Exception{
		Map<String,String> params = new HashMap<String,String>();
		Map<String,String[]> requestParams = request.getParameterMap();
		for (Iterator<String> iter = requestParams.keySet().iterator(); iter.hasNext();) {
			String name = (String) iter.next();
			String[] values = (String[]) requestParams.get(name);
			String valueStr = "";
			for (int i = 0; i < values.length; i++) {
				valueStr = (i == values.length - 1) ? valueStr + values[i]
						: valueStr + values[i] + ",";
			}
			//乱码解决，这段代码在出现乱码时使用
			valueStr = new String(valueStr.getBytes("ISO-8859-1"), "utf-8");
			params.put(name, valueStr);
		}
		
		boolean signVerified = AlipaySignature.rsaCheckV1(params, AlipayConfig.alipay_public_key, AlipayConfig.charset, AlipayConfig.sign_type); //调用SDK验证签名

		//——请在这里编写您的程序（以下代码仅作参考）——
		if(signVerified) {
			//商户订单号
			String out_trade_no = new String(request.getParameter("out_trade_no").getBytes("ISO-8859-1"),"UTF-8");
		
			//支付宝交易号
			String trade_no = new String(request.getParameter("trade_no").getBytes("ISO-8859-1"),"UTF-8");
		
			//付款金额
			String total_amount = new String(request.getParameter("total_amount").getBytes("ISO-8859-1"),"UTF-8");
			
			cartService.paySuccess(out_trade_no);
			model.addAttribute("money", total_amount);
			return "/client/paysuccess.jsp";
			
		}else {
			return null;
		}
		
	}
	
	
	@RequestMapping("/toOrder.do")
	public String toOrderHandler(HttpSession session){
		User login_user  = (User) session.getAttribute("login_user");
		if(login_user != null){
			return "/client/order.jsp";
		}else{
			return "/error/privilege.jsp";
		}
		
		
	}
	
	@RequestMapping("/findOrder.do")
	public String findOrder(HttpSession session){
		User login_user = (User) session.getAttribute("login_user");
		if(login_user == null){
			return "/error/privilege.jsp";
		}
		
		Map<Product,Integer> cart = (Map<Product, Integer>) session.getAttribute("cart");
		
		return "/client/cart.jsp";
	}
	
}
